EP1774201B1 - Kugelschraugetriebe für ein elektromechanisches lenksystem und mutter für ein kugelschraubgetriebe - Google Patents

Kugelschraugetriebe für ein elektromechanisches lenksystem und mutter für ein kugelschraubgetriebe Download PDF

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Publication number
EP1774201B1
EP1774201B1 EP05764101A EP05764101A EP1774201B1 EP 1774201 B1 EP1774201 B1 EP 1774201B1 EP 05764101 A EP05764101 A EP 05764101A EP 05764101 A EP05764101 A EP 05764101A EP 1774201 B1 EP1774201 B1 EP 1774201B1
Authority
EP
European Patent Office
Prior art keywords
ball bearing
ball
nut
screw mechanism
threaded spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05764101A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1774201A1 (de
Inventor
Martin Budaker
Klaus Dieter Leimbach
Walter Bulling
Oliver Hetzel
Klaus BÖRROTH
Oswald Wirth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Automotive Steering GmbH
Original Assignee
ZF Lenksysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Lenksysteme GmbH filed Critical ZF Lenksysteme GmbH
Publication of EP1774201A1 publication Critical patent/EP1774201A1/de
Application granted granted Critical
Publication of EP1774201B1 publication Critical patent/EP1774201B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0442—Conversion of rotational into longitudinal movement
    • B62D5/0445—Screw drives
    • B62D5/0448—Ball nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
    • F16H25/2219—Axially mounted end-deflectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19744—Rolling element engaging thread
    • Y10T74/19749—Recirculating rolling elements
    • Y10T74/19767—Return path geometry
    • Y10T74/19772—Rolling element deflector

Definitions

  • the invention relates to a Kugelschraubgetriebe for an electromechanical steering system of a vehicle, in particular for a motor vehicle, according to the preamble of claim 1 and a nut for a Kugelschraubgetriebe a steering system according to claim 14.
  • the EP 0 133 003 B1 describes a Kugelschraubgetriebe for an electromechanical steering system of a motor vehicle with an operatively connected to a steering handle via a pinion and a rack threaded spindle having helical ball tracks around the circumference, wherein the threaded spindle protrudes axially immovably mounted in a gear housing nut, with respect to the threaded spindle during rotation the nut is axially movable.
  • the nut has helical ball raceways. The ball raceways of the threaded spindle and the nut are used for common reception of load-transmitting balls within the axial region of the nut.
  • the threaded spindle is connected via a geared connection of tie rods and wheel steering levers with steered wheels of the vehicle in operative connection, wherein in an axial movement of the threaded spindle, a steering angle of the steered wheels of the vehicle is changed.
  • the known steering gear have the principle of single chain deflection of the ball chains in the steering nut, the ball track is interrupted in the ball guide and the Kugelschraubgetriebe with Querkraftbeetzwegung the threaded spindle, so especially in such electromechanical steering systems occurring high forces perpendicular to the longitudinal axis of the rack and the threaded spindle tends to noise because the threaded spindle and fixed to her gear connection to the steered wheels of the vehicle in the ball guide area is not uniformly supported radially by the balls.
  • the balls are pressed in particular in Quererkraftbeetzstoffung the threaded spindle in a transition region of the ball guide to the ball raceways in a bearing threaded portion, the usual, ending in a circular opening with an inlet edge ball guide to a jerky entry or discharge of the balls in the load entry or load discharge zone contributes the ball races.
  • the invention has for its object to provide a Kugelschraubgetriebe for an electromechanical steering system, the load inlet and load discharge zone allows a uniform, low-noise operation of Kugelschraubgetriebes.
  • the object is achieved with a Kugelschraubgetriebe with the features of claim 1 and with a nut for a ball screw with the features of claim 13.
  • its load inlet and load discharge zone of the mother are designed in their transition region to the thread grooves that an approximately progressively progressively changing Contact surface between the ball raceways of the threaded spindle and the balls results.
  • the balls are accelerated or decelerated over the gradually increasing or decreasing contact surface with the ball raceways of the threaded spindle and thereby also gradually changing the balls rolling friction not jerky in this transition region.
  • the balls run from the ball guide in the nut along two edges of a Gothic track profile until they enter the thread at the plant pressure angle.
  • the balls are thus successively exposed to the rolling friction by the relative movement of the threaded spindle and the nut or withdrawn and taken by itself with in or out of a Kuget Weglaufkanal to the mother.
  • the balls are not pushed jerkily and are jerked into the threads, which are formed jointly by the ball raceways on the nut and the threaded spindle.
  • the ball return with the Kugelumlenk nowadaysen and the ball return channel is preferably housed in the shell of the nut
  • the Kugelumlenk USA is preferably integrally formed in a forming and / or casting and formed of a metal or non-metal material.
  • the ball return passage is preferably at a small radial distance from the circumference of the threaded spindle substantially or completely within the nut.
  • the ball return channel which preferably extends as a substantially axially guided bore in the shell of the nut is guided tangentially to the transition region of Kugelumlenk nowadayses to the ball raceways, so that the respective Kugelumlenks can be formed as an insert for the mother and the opening of the ball return channel and the Kugelumlenk nowadayses come to rest after inserting the respective Kugelumlenk nowadayses in the nut in alignment.
  • the Kugelumlenk are positioned in an assembly-friendly, particularly preferred embodiment of the nut at axial ends of the nut or in the vicinity, so that the Kugelumlenk widelye easily with one axial securing element, such as a snap ring and / or a spring element, such as an axially between the Circlip and the Kugelumlenk commonly arranged, preferably with an elastomer, such as rubber, coated disc set can be. At least in the area of the ball deflection pieces, the balls roll over a gothic track profile.
  • FIG. 1 shows in a longitudinal section a ball screw transmission 1 for an electromechanical power steering system of a motor vehicle.
  • a rotatably held in a transmission housing 19 threaded spindle 2 is connected to a steering handle of the motor vehicle via a rack, not shown, on which a rotatably connected to the steering handle pinion meshes connected.
  • the gear housing 19 both the Kugelschraubgetriebe 1, the threaded spindle 2, and an electric motor 20, which acts on a reduction gear 21 to a nut 3, arranged.
  • the threaded spindle 2 has around its circumference helical ball raceways 4 with approximately the same pitch as helical ball valleys 4 in the nut 3.
  • the nut 3 is penetrated by the threaded spindle 2 and balls 5 of a ball chain 7, which is closed in the ball raceways 4 of threaded spindle 2 and nut 3, and in a ball return 12, each consisting of a Kugelumlenk Republic 6 (see Fig. 2) and a ball return channel 13, are arranged, with the threaded spindle 2 operatively connected.
  • the threaded spindle 2 shifts axially upon rotation of the nut 3.
  • On the threaded spindle 2 is a geared connection, consisting of tie rods and wheel steering levers set to steerable wheels of the motor vehicle, so that with a axial displacement of the threaded spindle 2 on the nut 3, a steering angle of the steerable wheels is changed.
  • the balls 5 run in the ball raceways 4 with the smallest possible game.
  • one or more ball chains 7 are provided, which has a closed thread of more than 360 ° form, without interruption of the supporting ball track.
  • ball deflection pieces 6 are inserted and fixed in the wall of the nut 3, which are designed such that they have a continuous surface area which reduces the ball tracks 4 in their transitional area 8 to the ball raceways 4 , which in turn allows a steadily progressively changing contact surface 9 of the balls 5 to the ball raceways 4.
  • Fig. 2 is a partial longitudinal section and in a view of the ball screw 1 in Fig. 1, the structure of the ball screw 1 with a single ball chain 7, which extends over about four threads of the nut 3 shown.
  • the same reference numerals apply to the same components as in FIG. 1.
  • the ball return passage 13 in the shell of the nut 3 is guided approximately axially, so that its opening is arranged tangentially to the respective end 11 of the Kugelumlenk deserte 6.
  • the Kugelumlenk deserte 6 thus assume both the deflection of the balls 5 of the Kuge Weglauflaufkanal 13, as well as the inlet and outlet of the balls 5 from the ball raceways. 4
  • the Kugelumlenk thoroughlye 6 are, as shown in FIG. 3, cast in one piece. You can, as illustrated in Figures 2 and 4, in the axial direction at the ends of the nut 3 in precisely fitting openings 18,18 'inserted and each with an axial securing element 14, such as a snap ring and preferably with a spring element 15, such as with an elastomeric material, such as rubber, coated steel disc, are set in the nut 3.
  • an axial securing element 14 such as a snap ring
  • a spring element 15 such as with an elastomeric material, such as rubber, coated steel disc
  • 5 shows a view of a load entry and load discharge zone 10 on the nut 3 in the area of a plant pressure angle 22 with a Gothic track profile 16, which receives a fork structure in that the raceway profile 16 is cut obliquely and a linear guide of the balls. 5 splits fork-shaped in this area, whereby the balls 5 are taken away by itself due to the rolling friction in a relative movement between the threaded spindle 2 and nut 3. As a result, a quiet, jerk-free operation of the ball screw 1 is guaranteed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)
  • Rolling Contact Bearings (AREA)
  • Power Steering Mechanism (AREA)
EP05764101A 2004-08-03 2005-07-18 Kugelschraugetriebe für ein elektromechanisches lenksystem und mutter für ein kugelschraubgetriebe Active EP1774201B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004037599A DE102004037599A1 (de) 2004-08-03 2004-08-03 Kugelschraubgetriebe für ein elektromechanisches Lenksystem und Mutter für ein Kugelschraubgetriebe
PCT/EP2005/053424 WO2006013148A1 (de) 2004-08-03 2005-07-18 Kugelschraugetriebe für ein elektromechanisches lenksystem und mutter für ein kugelschraubgetriebe

Publications (2)

Publication Number Publication Date
EP1774201A1 EP1774201A1 (de) 2007-04-18
EP1774201B1 true EP1774201B1 (de) 2008-01-16

Family

ID=34972951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05764101A Active EP1774201B1 (de) 2004-08-03 2005-07-18 Kugelschraugetriebe für ein elektromechanisches lenksystem und mutter für ein kugelschraubgetriebe

Country Status (9)

Country Link
US (1) US20070204711A1 (ja)
EP (1) EP1774201B1 (ja)
JP (1) JP4907531B2 (ja)
KR (1) KR101240087B1 (ja)
CN (1) CN100449173C (ja)
AT (1) ATE384214T1 (ja)
DE (2) DE102004037599A1 (ja)
ES (1) ES2299057T3 (ja)
WO (1) WO2006013148A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051268A1 (de) 2010-11-12 2012-05-16 Volkswagen Ag Elektromechanische Fahrzeuglenkung mit Kugelgewindetrieb
DE102013112842A1 (de) 2013-04-30 2014-10-30 Zf Lenksysteme Gmbh Kugelgewindetrieb
DE102019208409A1 (de) * 2019-06-08 2020-12-10 Robert Bosch Gmbh Lenksystem für ein Kraftfahrzeug

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US8272289B2 (en) * 2004-09-08 2012-09-25 Thk Co., Ltd. Roller screw
DE102007012532A1 (de) 2007-03-15 2008-09-18 Zf Lenksysteme Gmbh Verfahren zum Betrieb einer elektrischen Servolenkvorrichtung
WO2010072665A1 (de) 2008-12-23 2010-07-01 Basf Se Modifizierung von nano- oder mesofasern oder textilen flächengebilden hergestellt mittels elektrospinnen mit amphiphilen proteinen
DE102009046118A1 (de) 2009-10-28 2011-05-05 Zf Lenksysteme Gmbh Verfahren zum Betrieb einer elektrischen Servolenkung eines Fahrzeugs und elektrische Servolenkung
CN102401101A (zh) * 2010-09-10 2012-04-04 张旸斌 扭力滑块
JP5982313B2 (ja) * 2013-03-25 2016-08-31 日立オートモティブシステムズ株式会社 パワーステアリング装置およびパワーステアリング用減速装置
JP2015047997A (ja) 2013-09-03 2015-03-16 日立オートモティブシステムズステアリング株式会社 パワーステアリング装置およびパワーステアリング装置の製造方法
JP6151161B2 (ja) * 2013-11-29 2017-06-21 株式会社ショーワ ボールねじおよびパワーステアリング装置
CN104791446A (zh) * 2014-01-22 2015-07-22 全球传动科技股份有限公司 回流元件加工方法、直线运动模块及滚珠螺杆的组装方法
JP2015168371A (ja) * 2014-03-10 2015-09-28 株式会社ショーワ 操舵装置
US10293848B2 (en) 2014-12-03 2019-05-21 Trw Automotive U.S. Llc Rack ball nut assembly for a vehicle steering gear and related components thereof
US9802640B2 (en) * 2015-09-25 2017-10-31 Steering Solutions Ip Holding Corporation Ball screw assembly
DE102019201933A1 (de) * 2019-02-14 2020-08-20 Robert Bosch Gmbh Lenksystem

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ES2003712A6 (es) * 1987-04-29 1988-11-01 Waybol Sa Un husillo a bolas recirculantes por deflector de apoyos semiesfericos con movimiento ondulante-esferoidal para el auto-alineado de las bocas de las acanaladuras del conjunto tuerca-deflector
DE29504812U1 (de) * 1995-03-21 1995-05-18 Star Gmbh Wälzkörperschraubtrieb
CN1107178C (zh) * 1996-06-21 2003-04-30 Thk株式会社 滚珠丝杠装置
JP3964007B2 (ja) * 1997-07-31 2007-08-22 Ｔｈｋ株式会社 側蓋式ボールねじ装置
US6464034B1 (en) * 1999-02-04 2002-10-15 Ntn Corporation Electrically powered steering device
US6675669B2 (en) * 2000-08-23 2004-01-13 Nsk Ltd. Ball screw apparatus
JP2002227955A (ja) * 2001-02-06 2002-08-14 Nsk Ltd ボールねじ
JP4288903B2 (ja) * 2001-07-30 2009-07-01 日本精工株式会社 ボールねじ装置
DE10297160B4 (de) * 2001-09-04 2015-11-19 Thk Co., Ltd. Kugelumlaufspindel
JP2003074663A (ja) * 2001-09-05 2003-03-12 Nsk Ltd ボールねじ
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DE10214481A1 (de) * 2002-03-30 2003-10-16 Ina Schaeffler Kg Kugelgewindetrieb mit Umlenkstück
JP2003314658A (ja) * 2002-04-24 2003-11-06 Toyoda Mach Works Ltd ボールねじ装置及び電気式動力舵取装置
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JP2003336715A (ja) * 2002-05-21 2003-11-28 Nsk Ltd ボールねじ
JP4053826B2 (ja) * 2002-06-25 2008-02-27 Ｔｈｋ株式会社 循環部品、並びにこの循環部品を用いた運動案内装置及びボールねじ
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051268A1 (de) 2010-11-12 2012-05-16 Volkswagen Ag Elektromechanische Fahrzeuglenkung mit Kugelgewindetrieb
DE102013112842A1 (de) 2013-04-30 2014-10-30 Zf Lenksysteme Gmbh Kugelgewindetrieb
DE102019208409A1 (de) * 2019-06-08 2020-12-10 Robert Bosch Gmbh Lenksystem für ein Kraftfahrzeug

Also Published As

Publication number Publication date
KR101240087B1 (ko) 2013-03-06
CN1993574A (zh) 2007-07-04
WO2006013148A1 (de) 2006-02-09
ES2299057T3 (es) 2008-05-16
DE102004037599A1 (de) 2006-04-20
US20070204711A1 (en) 2007-09-06
KR20070038138A (ko) 2007-04-09
EP1774201A1 (de) 2007-04-18
ATE384214T1 (de) 2008-02-15
JP4907531B2 (ja) 2012-03-28
DE502005002584D1 (de) 2008-03-06
CN100449173C (zh) 2009-01-07
JP2008509353A (ja) 2008-03-27

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